Changes

* '''The Pi has 256 MB of memory. ''' This is enough for most casual program use, such as word processing, spreadsheets, and browsing. It is also plenty of memory for many web serving and control tasks, since these tasks don't require the a graphical user interface.* '''The processor on the Pi is a 700 MHz ARM processor. ''' This is not really fast compared to a modern PC, but still offers plenty of power for many purposes. Since this is an ARM processor, it will not directly run Microsoft Windows.* '''Storage is provided by SD cards ''' (the same cards used in most digital cameras). These are inexpensive, have high capacity, and are durable (your students can accidentally leave them in their jean pockets and they'll still work after the laundry is done). Students can have multiple SD cards configured with different software and swap between them.* '''The Pi runs Linux. There are tens ''' This means that the software is free and fully modifiable. Tens of thousands of programs are available, ranging from productivity applications (image editing, word processing, spreadsheets) to computer computer programming languages (Python, Perl, C/C++, PHP, Lua, BASIC, and many others), from servers (web, ftp) to science tools (machine vision, voice synthesizers). A basic "image" is downloaded and copied to the SD card, and then the Pi's user can add and remove software to customize the system as they see fit. Alternately, an image can be customized by a teacher and then copied for use on other student computers.